Improved spring-bed bottom



thrown upv by the depression ofthe other, as is the .f ate-nt tattica.'

'JAMES P. GHAMERLIN, OF ABINGTON, MASSACHUSETTS.,

Letters Patent No. 98,146,

dated December 21, 1869.

IMPROVED SPRING-BED BOTTOM The Schedule referred toin tnese Letters Patent and making part o! th'e same.

To all whom lt may con-cern:

Be it known that I, JAMnsP. GHAMBERLIN, of Abington, iu the county of' Plymouth, andState of Massachusetts, have invented an Improvement in i Spring-Bed Bottoms, of which the following-is a full, clear, and exact description, reference being had to the aecompan ying drawings, making part of this speciiieation, in whichf Figure 1 is a plan ofmy improved spring-bed bottom. y

Figure 2 is a sect-ion, on the line x x of fig. 1.

Figure 3 is a pelspective view of one of the springs detached.

My invention has for its object to produce a springbed bottom, of simple construction, which can be afforded at a low cost, and consists in the .employment of springs of peculiar form, each spring being composed ofa rod, secured rigidly at one end, the opposite end being provided with an arm or lever, which is secured. to the slat at or near its end, the depression of which produces a torsion of thc rod, and as two of these springs are secured to each slat, the depression of one end will carry down the other, and the slatwill i thus be maintained at all times in a horizontal or nearly horizontal position, instead of one end being case in many ofthe spring-bed bottoms now in use.

'lo enable others ,skilled in the art to understand and use my invent-ion, I will proceed to describe the manner in which l have carried it out.

In the said drawings- A A represent the side pieces of the bed-bottom, and B B,'the rails, to which are secured the springs a, which support the slats G C.

These springs, which are composed of` rods of steel, or other suitable metal, are laid parallel to each other, and one end of each springy is secured rigidly to the rail by driving into it the bent portion 4, iig. 3.

The opposite end of the spring is bent so as to formd an arm or lever, b, the end 5 of which is bent at a right derside of the Slat, by a 4strap or staples, instead o'f passing through the slat.

The horizontal portion of each spring, near the arm b, is steadied, and prevented from being thrown ont of place, by a staple, c, driven intothe rail.

Ou pressure being applied to a slat, C, the arm bis turned, or partially revolved, which twists the hori- 'zontal portion of the springa, the torsion thus pro duced causing the arm to return the slat to its original position, on the pressure being removed therefrom.

' A simple, effective, and noiseless spring is thus produced, which isnot liable to set or break.

It will be seen, that as each slat is secured to and supported upon two springs, the depression of one end of the slat will carry it forward, and turn the arm of the spring at the opposite end, and, consequently, bot-lx ends of the slat will be depressed simultaneously, as seen in dotted lines, iig. 2.

The body of' the person lying upon the bed will thus be maintained, at all times, in a horizontal or nearly horizontal p sit-ion, and the discomfort, arising from one end olf t 1e slat being thrown up, by pressure upon the opposite end, is thus entirely, avoided.`

A bed-bottom, constructed as above described, may

be aorded at a low cost, on account of its simplicity of construction, while it is not liable to break, or get out of order.

Claim. y

Wfhat I claim as my invention, and desire to secureby Letters Patent, is-

The springs a, with their arms b, iu combination with the slats (l, when constructed to loperate substantially as and for the purpose described..

JAMES P. GHAMBERLIN.

Witnesses z P. E. TesoHnMAoHEa, N. W. STEARNS. 

